Dacron heat shrunk over a frame is used to make very light boats:michaelplogue said:I'm surprised nobody has suggested a flexible, fabric skin velomobile body - like the concept BMW GINA. You wouldn't necessarily need to have it capable of changing shape, but a simple fiberglass, CF, or aluminum rod framework with a durable lycra-like fabric would make a simple and aerodynamic body. If one wanted a more permanent solution, one could simply give it a couple of good layers of spray epoxy.

Can be painted with regular latex paint for a more solid look.